mccool



(No Model.) 3 SheetsSheet 1.

W A McGOOL DRAWING METALS.

No. 400,238. Patented Mar. 26, 1889.

NV mans, Pholo-Lflhognpher, Washington, 0 c.

(No Model.) 3 Shets-Shet W.- A. MOGOOL.

DRAWING-METALS.

Patented Ma1u26, 1889.

N. PETERS, Phmo-Lflhugnphu, Washington 9. c.

' 3 Sheets-Sheet 3. W. A. MOCOOL. DRAWING METALS.

Patented Mar. 26, 1889.

fizz/gi (No Model.)

\VILLIAM A. MCOOOL, OF BEAVER FALLS, PENNSYLVANIA, ASSIGNOR OF ONE-HALFTO II. IV. IIARTMAN, OF Si'iME PLACE.

DRAWING METALS.

SPECIFICATION forming part of Letters Patent No. 400,238, dated March26, 1889.

Application filed October 1, 1888. Serial No. 286,837. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM A. MCCOOL, a citizen of the United States,residing at Beaver Falls, in the county of Beaver and State ofPennsylvania, have invented certain new and useful Improvements inMachines for Drawing Metals; and I hereby declare the following to be afull, clear, and exact description of the same, reference beinghad tothe accompanying drawings, wherein Figure 1 is a side elevation ofametal-drawing machine embodying my invention. Fig. 2 is a plan View ofsaid machine. Fig. 3 is a vertical central longitudinal section of themachine. Fig. i is an enlarged plan view of a portion of the box ortunnel, track, draftchains, sprocket-wheel, grips, and die, the

grips and die being partly in section, showingthe rod to be drawn. Fig.5 is an enlarged view of one of the grips and its carriage. Fig. 6 is asimilar view of the die, showingits attachment to the box or tunnel andthe slots for the passage of the draft-chains. Fig. 7 is an enlargeddetail view of one of the bearings of a sprocket-wheel. Fig. 8 is a sideview of the sectional grip-block or bushing; and Fig. 9 is a front orend view of the sectional gripblock, looking in the direction of thearrow, Fig. 8.

Like symbols refer to like parts wherever they occur.

My present invention relates to machinery for drawing metals, and maybebroadly stated as one which combines two grips, an intermediate die, andpower mechanism adapted to actuate either grip, and the equivalent ofthe two grips may be generally stated as any grip device adapted to beused first to force the rod or like article into the die and thentraveling grip or set of grips. Extending therefrom are two side frames,I) B, constituting an open box or tunnel formingatrack, D D, for thecarriages E E of the traveling grips and a support or frame for thedie-block C. At one end of said tunnel or box, on the shaft of thecog-wheel e, are sprocket-wheels ff, and at or near the opposite endthereof is journaled a shaft, 6, having corresponding sprocket-wheels, hh, while two parallel chain belts, it, connect the said sprocket-wheelsand are the preferred means for transmitting power to the travelinggrips. The chain belts 7c 70, arranged within the tunnel, may besupported at suitable intervals by rollers Z I, so as to correct any sagthereof and relieve the power-shaft and tightening-shaft g of anyunnecessary weight or strain, and the tightening-shaft g (ofsprocket-wheels h h) may be journaled in sliding hearings on m, (seeFig. 7,) if desired.

0 indicates the die-block supported on the frames B B, and preferablysecured thereto near one end thereof, as shown in Fig. 1.

The preferred detailed construction of the die-box and die is bestunderstood from the enlarged View, Fig. 6, considered in connection withFig. 4:.

The die-block C may be a solid (or single) casting sufficiently wide toextend from B to B, and provided with flanges by which it may be boltedto the frame or it may be any other construction that circumstancesdictate. It has a central circular aperture, 91, for the die, and twolateral apertures, 0 0, for the passage of the draft-chains 7t 7c. Thedie 1 may be of the tapering concentric solidring pattern, or any otherapproved form.

Mounted on track D D of frame B and movable therein or thereon is asuitable grip truck or carriage, E, (see Figs. 4 and 5,) which, ifdesired, maybe a single casting with journals (or journalbearings) P P,for the wheels 10 thereof, or may be built in sections and from anysuitable material, if preferred. This carriage has a centralgrip-aperture, 3, having inclined sides (or tapering) for the receptionof the tapering sectional grip 4; and in order to preserve the properposition of the grip-sections in the holder (the truck) 1 prefer toemploy keys and keyways or splines,

as indicated at .9, Figs. t and 5. The interior of the grip may he facedor provided with bushing, as at r r, if desired.

At the sides of the grip-aperture, and usually in line therewith, areslots i; t for the passage of the draft-chain belts 7; 717, andintersecting said ehainslots are pin-slots -r I, (see Fig. -i.-,) forthe coupling-pins V (see Fig. by which the grip-carriage may beconnected with the drattchains 7. 7.", or equivalent source of power.

Two grips and grip-carriages are employed, one placed before and theother behind the die, and they will he found to he more efficient andworlunanlike in construction it the stru .:tural dil'tferenees shown inFig. 4c are preserved, though it will be at once apparent that thedifference between the construction of right-hand and left-hand grip ofFig. 4 is one of form and not of principle.

In order to actuate the grip, a lever, 5, (see Fig. 3,) pivoted orhaving its fulcrum on the carriage, as at U, is provided with a pin, 7,as indicated in dotted line, Fig. 5, which controls the sections of saidgrip t to release or witlulrawsaid sections when the grip is to beshifted or loosened.

It will be noted that the form of gripshown is one having anunobstructed axial opening which will permit the free passage of a rodor bar of any length." This is a material feature of the grip where verylong rods, bars, &e., are to he drawn, it enables the grip to be shiftedfrom ti mete time to renew its hold on the rods near the die, and italso enables the rod to pass through the rip as readily as through thedie, and as continuously, which is a valuable feature in the first orentering grip.

The devices having the features hereinbefore described are operated byme as follows in carrying out my method: o will suppose the pins V Vwithdrawn from both carriages or trucks E E, power applied by means ofthe gearing to draftehains 7r 7., and said chains running free orwithout operating the grip-carriages The rod, bar, tube, or otherarticle to be drawn is passed through the grip of the first (or left-11aud) carriage until its leading end projects therefrom a sutticientdistance to pass through the die when the said first carriage has movedup to the die, and the grip of said carriage is then closed bymeans oithe lever 5, as before noted. It is desirable that no excessive lengthof the leading end of the article should project, in order that there heno loss of power or tendency of the rod or bar to bend where unsupportedby the die and rip. The pins V are then inserted and the first (orleft-hand) car riage coupled to the power-ehain,whieh causes thecarriage to advance and force the end of the article into and. throughthe die. The pins Y are then withdrawn and the lefthand or first gripreleased, and the second (oi-righthand) grip actuated by its lever 5 toseize the rod, bar, or other article on. theopposite side of the die,after which the second (orright-hand) grip-carriage is coupled to thepower and the article drawn in the usual way. In case of long rods theunobstructed axial opening oi? the die and the arrangemt-mt of the powermechanism permit the second or draft grip to be shifted from. time totime, so as to renew its hold on the rod near the die, whereby anycontinuous length of rod may be drawn without interrupting the operationof the machine hut mon'ientarily. Further, the character of the grip issuch that after the lefthand or first grip has performed its function asan entering grip it becomes a guide, and. therefore is not inoperativeor useless thercafter, as many other forms of grip which mi ght be usedwould be.

.llaving thus described the nature and advantages of myiuvention,wl1atI-claim, an d desire to secure by Letters Patent, is

11. The combination, with a fixed drawingdie, of grip mechanism adaptedto first force and then pull the article operated on,suhstantially asand for the purposes specified.

2. The combination, with two grips, of an interposed. fixed die andmechanism for actuating the grips, suhstantiall y as and for thepurposes specified.

3. The combination, with a fixeddrawingdie, of a grip having anum)bstructed axial opening throughout its length, and power mechanismfor act uatin said grip, said power mechanism arranged at one side, oroil the axial or centerline of the die and grip,whereby thehold ot thegrip on the rod heingdrawn may be advanced from time to time to drawcontinuous rods of any desired lengtl1,sul: stantially as specified.

4-. The combination, with two grips, each of which has an unobstructedaxial opening throughout its length, ot' an interposed die,substantially as and for the purposes specified.

In a metal drawing machine, the combination,with a grip-truck having atapering annular orifice or grip-seat, of a tapering annular sectionalgrip, sul'istantially as and for the purposes specified.

G. In a metaldrawing machine, the combination,with a grip'truek. havinga tapering grip-seat, of atapering sectional grip, a griplcver having a[fulcrum on the truck, and a pin for actuating the grip-sections,substantially as and for the purposes specified.

7. The combination, with a fixed drawingdie, of a pushing-grip arrangedin front ol' said die, and power mechanism for actuating said grip,substantially as and For the purposes specified.

In. testimony whereof I allix my signature, in presence of twowitnesses, this 24th day of September, 1889.

\VILLIA M A. MUCOOI...

\Yitn essesr .T. If. Minimum, ll. W. Nam.

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